[WAY]

Hi all, I've been meaning to do something about the excessive rolling and squat on my M135i. I have read a few threads where the change of springs appear to have helped this, however I have only come across one person who have changed his springs on a car with adaptive damper. This person had used the same Eibach Pro springs for non adaptive damper, but Eibach doesn't recommend this.

I would like to know what other options I have and if anyone else has done this. Thanks.

[ovekvam]

The best solution is to install a complete kit with matched springs and dampers, like a coilover kit. Bilstein and KW have good reputation, but I don't know if they offer kits for your car.

[WAY]

Originally Posted by ovekvam

The best solution is to install a complete kit with matched springs and dampers, like a coilover kit. Bilstein and KW have good reputation, but I don't know if they offer kits for your car.

I agree. Had I not specced adaptive suspension from the factory, that's what I would have done. I've had great experiences with KW competition coilovers, H&R and Bilstein in the past on various cars, but because of my spec, I don't want to mess with the electronics (plus the fact that I've paid for the adaptive function!).

[PeterPure]

I have H&R on my adaptive dampers. No issue at all.

[Bee Pee]

I have h&r springs with adaptive and no issues

[WAY]

Which H&R Darkhold and Pave Dew?

[Bee Pee]

Sport springs on mine with a drop of -25mm all round

Not the super sport springs, much harder and more drop

[WAY]

25mm drop may be too low for me. More importantly, how is the handling now? Has it improved?

[Bee Pee]

H&R drop means car sits level. Other products like ACS and Eibacha give a nose down stance.

I have thicker ARB's all round and quaife LSD.

Ride in comfort is now more like how it was in sport with oem springs.

Even in comfort, corners flat and rear is much better controlled over uneven, poor surfaces. Traction is much improved, TC light flashing is almost non existent.

Sport mode, ride is firmer but still OK.

I think my car is how it should come from the factory, hence why BMW have stiffened up m235i all round and will hopefully be offering an LSD as a retrofit.

[MeganeTrophyGuy]

If the main thing you are concerned with is roll, why not fit an anti-roll stabilizer kit instead? (had good success on my BMWs with Eibach in the past....)

[PeterPure]

Also have the sport h&r 25mm drop. Comfort still comfy and sport not too hard. I like the ride much better now.

[lac.le]

How much did it cost for the ARB's?

Do you have a link to them?

Did you have the suspension done too or just the ARB's?

Thanks

Originally Posted by Pave Dew

H&R drop means car sits level. Other products like ACS and Eibacha give a nose down stance.

I have thicker ARB's all round and quaife LSD.

Ride in comfort is now more like how it was in sport with oem springs.

Even in comfort, corners flat and rear is much better controlled over uneven, poor surfaces. Traction is much improved, TC light flashing is almost non existent.

Sport mode, ride is firmer but still OK.

I think my car is how it should come from the factory, hence why BMW have stiffened up m235i all round and will hopefully be offering an LSD as a retrofit.

[Bee Pee]

ARB price see link below from Birds here in the UK.

http://www.birdsauto.com/parts/M2031215350

I believe eibach do ARB kits too.

Yes, ARB, LSD and springs all fitted in a oner

Car is much more chuck able in the bends but ride is still v good.

[lac.le]

Originally Posted by Pave Dew

ARB price see link below from Birds here in the UK.

http://www.birdsauto.com/parts/M2031215350

I believe eibach do ARB kits too.

Yes, ARB, LSD and springs all fitted in a oner

Car is much more chuck able in the bends but ride is still v good.

Great, thanks.

I'll have a look into it. What would you get first? The ARB's, the H&R Sports Springs or the LSD?

[Bee Pee]

Originally Posted by lac.le

Great, thanks.

I'll have a look into it. What would you get first? The ARB's, the H&R Sports Springs or the LSD?

Depends what your priorities are.

If you want looks and improved handling - springs only.

If you want stealth handling and traction improvement then arb's and LSD.

I wanted all of the above hence why I did the lot.

[ovekvam]

Good handling depends on the driver and conditions. A rally car does not have the same setup in every rally, and two drivers on similar car could prefer very different setups. Notice that stiffer springs, lower ride height or stiffer swaybars could also make the car slower or more difficult to drive in some conditions.

The LSD has no drawbacks in my opinion.

In general, the smoother and flatter roads you drive on, the lower and stiffer suspension is suitable. For bumpy roller coaster B roads, you want lots of suspension travel and a rather soft setup. A smooth driver can also get away with a softer setup than an edgy driver. Contrary to what many people think, the soft setup will give you more grip and traction, as the load is more evenly distributed on the tyres.

The same thing goes for tyre pressures. By driving smoother, you can reduce the tyre pressures a bit, and gain grip.

[Cateye]

I could not find part number for hnr springs online. It's for M135.
however I could see M235 part number..
Anyone can help?

Deciding between Eibach or HnR...

Cheers.

[ovekvam]

I haven't tested Eibach/H&R for the M135i, but H&R road springs are usually firmer than Eibach road springs. While H&R are more focused on performance, Eibach are more focused on comfort.

[Bee Pee]

Lots of bumpy poorly surfaced roads here in the UK and having driven m135i before and after, I can vouch that shorter springs sort out the much publicised oem flaw of too much understeer at front and rear gets ragged not even near the limit.

[lac.le]

Originally Posted by Cateye

I could not find part number for hnr springs online. It's for M135.
however I could see M235 part number..
Anyone can help?

Deciding between Eibach or HnR...

Cheers.

http://www.ebay.com.au/itm/360584594...84.m1423.l2649